Aircon - Hissing Sound

[Dieseler]

What is the cause of hissing sounds in an aircon? What if it comes on frequently? I sometimes hear this, and it is quite irritating.

[BlueBimmer]

let me take a guess...that hissing sound comes from the expansion valve..normal i think..

[Dieseler]

*BlueBimmer,

I was told too na its from the Expansion Valve. Question lang, is it normal if it hisses like for around 5-10 seconds, in 10-20 second intervals?

[BlueBimmer]

it should not hiss frequently, not sure but check the freon maybe ur low, needs recharging..

[tebs]

hahaha... ganun din sa crosswind namin, laging naghihiss yung aircon.

kala nga ng passenger ko, galing sa radio. hehehe

[afrasay]

Expansion valve yan. Quite normal. The on-off cycles signifies that the thermostat works.

[OTEP]

Don't be too alarmed. The hissing sound is common to most a/c systems.

[1D4LV]

they are correct, those are expansion valves. experienced that last year. replaced it tsaka evaporator sa casa sabay palinis na rin ng aircon..